there are NO records of movement within the British Isles eg between Ireland + England, IoM and Ireland or England - all shared the same sovereign at that time.

The will was I think included in full on this board but to look at it just borrow the film from your local Family History Centre linked to the Church of Latter day Saints (LDS aka Mormons)
in mid to late 19th Century the IoM was a major producer of lead ore - this was smelted on Anglesea (Laxey was the main port for export) - before any visit to the Island it might be worthwhile to study the history (eg try www.manxnotebook.com)